I always thought it was understood, but I should add here beforehand that facts on this blog (especially conversations) get altered for comic impact. But the gist...
Sunday morning. Yesterday's leftover bagel and cream cheese has just been consumed.
Madge: Do we have more cream cheese?
Julie: No, I had the last. Do you want me to get you more?
Moi: Don't worry. I'll go.
Madge: Thank you, Mommy.